Tool-maker&#39;s gage.



C. HERTLL TOOL IVIAKERS GAGE.

APPucATxoN FILED MAR. 7. 1918.

Lg 3 4 Patented Dec. 3, 1918.

i 'sonni/,tannins Gase.

To all 'whom t may concern i p B e it known that I, CHARLES Herrin, a sub]ect 0f the Emperor of Austria-Hungary.,

residing at Astoria, in the county oQueens and State of New York, have invented ceritam new and usefulllmprovements in 'lloot Makers Gages, of- `which the tollowingis a specification, i

The present invention relates to tool makers surface gages adapted for light work and has for its object to provide a construction -wh-ichlwill greatly improve the hitherto used? gages in permitting minute and correct -gaging without diiiiculty. y

With this-object in View, my invention consists in the construction, combination and arrangement of parts as will be hereinafter more fully described and set forth in the `.appended claims. i

The invention is illustrated in the accom! panymg `drawingr which forms part of the specication, and `in which similar reference characters denote corresponding` parts,` Fig; ure l being a top plan View of the device showing the `manner invwhlch it 1s used;

Fig. 2is a setiononline 22 o'fulligl;

Fig. `3 `isan enlarged end view ot the mry crometer device for the micrometriegaging of the scriber, and 135g. 4 1s a section on line of Figm. i i u i i i ,p l The device consists substantially `et base 0f steel or other suitable material, in the `top surface otwhich a bracket is suitably supported." rllhe forward end of the `loraclnnt b serves as a bearlngtor a cylindrical arm d which carries a spindle 'erred f. The arm` d iS capable of turning around its axis with- `in the bearing of the bracket and to be fixed J in position after its" adjustment bya nute. rll`he spindle f projects `forward]y from the arm d andservef: as a support for the mechanism carrying the scriberp, which constitutes the tool gage. i, i

This mechanism comprisesa sleeve g trein the circumference on one sident which `projects a Wedgeshaped nose g formed centrally with an extension or spindle g2, which proper to be used `as a is partly screw threaded as at g3; The

wedge-shaped nose g is adaptedwtoengage into a depression it of a clamp member lafwhieh is adjustablymountedf on fthe spindle f. The spindle g2 is adapted to freely pass through the bore h2 provided ripecicatien of Letters Patent.

in the arms h3 of the clamp 7i, and to carry on its threaded end g? a washer j, spring ,7e and nut z' upon whose`tigfhtening; the inem`- ber L will be clamped in ,.iosition on the spindle f and the wedge g will be simultaneously drawn into the depression la and a tipfht joint between the sleeve g and the clamp member 7i produced @n the opposite side the sleeve g has a projection from which extends downwardly an oblique arm g5, the rear orlewer end et which bent as at gf* to be parallel with the ends oit the sleeve and is centrally` perforated at g7 to form af ring. ln the sleeve y is adapted 'to loosely bear a hollow spindle lm, on the outer circumference of which a tine thread m is previdedwhereby a micrometrie adjustment oit the scriber j), as will be ezrplainerhis aiu torded. This hollow spindle or sleeif'e m is slotted longitudinally at oneside as at fm2 of a block oli metal which, onthe opposite side of its working' surface, is provided with l n l n Q `a pro]ect1on Z slidablyborne in groove g8 retenir-,ea nee, rare, Appneation and Marca r, 191e. seriainaeaaeaa extending from the bore g of the sleeve q.

fr screw `oworkinnr in a threaded bore g1 et the sleeve extending; centrally troni the groove g8 is adapted to engage the member l sothat by its tightening or slackeninp; xthe member Zwill be moved inwardly or released and thereby clamp or release thescriber g5. Between the rear or lower end ot the sleeve g and the ring,` shaped bend or `arm` g, a beveled nut n is mounted, so proportioned that it snugly lits in the `spiace between the said parts. This nutis adapted topwork on the threads m ot' thespindlem sopas to feed the latter micrometrically `torwnrdly or rear erforation rfaccordinA to the direction et P i. y 2

`rotation of the nut. The `upper end of the nutis formed with a milled flange `n to `facilitate its handling. At the lower edge el the beveled surface et the nut a `rnicrometric i scale n2 isprovidedwhich can be read od'xby been "first roughly adjusted in position within the hollow of the inierometric spindle m,

` wardly within the sleeveg and" through the aS heretofore stated7 the fine adjustment can be accomplished by the turning` of the nut 'It into one or the other direction.

The device is used as follows:

Let us assume the central line of a spindle S is to be' ascertained. rIhe spindle may be secured in position on suitable base blocks l by clamps 2 or the like. rIhen a square `guide block y having-perfectly even side surfaces is placed against the side surfaces of base blocks l and the base a ofthe tool is placed with its front side surface against the rear side surface of the guide block g. lThe spin,- dle f is adjusted to the proper angle so as to bring the end of the scriber p within a small fraction of an inch above the upper surface of the spindle S. rThis adjustment is effected by the turning of the arm d in the member Y After this adjustment the nut c` tightened so as to x the position of the spindle f.

Now by estimation a more or less rough or free adjustment of theoperating end of the scriber toward thecentral line of the spindleis effected.v This is done by slackening1 the screw 0 and shifting the scriber within the sleeve mby hand either forwardlyv or rearwardly as the-case may be. On slackening the nut e thescriber is swungdown Ito be in Contact with the spindle S whereupon the nutk e is again tightened. After tightening the screw 0, the tool is shifted longitudinally by moving the base a alongthe guide block g, inthe course of which the scriber point will draw a line on the spindle which has been previously; covered with chalk or other suitable coating. Thereupon the guide block g and tool are placed on the opposite side of the spindle as indicated by dotted lines in Figs. l and 2 and the same operation is performed. If it should happen that the lines drawn by the scriber do not coincide but are separate lines as indicatedby the dotted and full lines y on the spindle.' then a further adjustment of the scriber is required. rI`he variance between` the two lines may be only thousandth part of an inch and it will be seen that a very fine adjustment of the scriber will be required. This fine adjustment is therefore performed by the micrometric device. On slackening the screw o, the sleeve m is ,fed forwardly 0r rearwardly as the case may require by the turning of the graduated nut n, an estimated amount into one or` the other direction from its zero position which registerswith the mark g on the part g6 whereupon the screw 0 is again tightened. After this new adjustment. the previously vdescribedv operation with the tool is performed from each side of the spindle, and such operation maybe repeated until the two lines g/ nally coincide with one another.

thread, a nut carried by said support and.

working on said thread to feed said sleeve in said support, a scriber movably borne in said sleeve, and means in said support to fix said scriber in position within said'sleeve after its micrometric adjustment by said nut iseffected. 2. In agage, the combination with an adj ustable spindle, of a scriber support adjustably supported on said spindle. a 4sleeve freely borne in said support and formed on` its outer circumference with micrometric thread7 a graduated nut carried by saidsupport 'and working on said thread to feed said sleeve in said support. a scriber movably borne in said sleeve, and means in said supl port to fix said scriber in position within said sleeve after its micrometric adjustment by said nut is effected.

3. A gage comprising a base, a spindle adjustably mounted on said base, a scriber supl port adjustably supported on said spindle, a sleeve freely borne in said support -and formed on its outercircumference with micrometric thread, a nut carried by; said, support and working` on said thread to feed said:

sleeve in said support, a scriber movably borne in said sleeve, and means in saidfsupport to fix said scriber in position within said sleeve after its micrometric adjustment by said nut is effected.

4. In a tool makers surface gage, the combination with an adjustable spindle, of `a scriber support having a wedge-shaped member, a clamp member adjustably supported on said spindle and having a groove *to engage said wedge-shaped member, and means for simultaneously clamping said clamp member to the spindle and fixing'said support to said clamp member.

lll)

In testimony whereof I affix my'signature in presence of two witnesses.

CHARLES I-IERTLE.

Witnesses:

FRED. J. GRrEsMER, ELsIE Scrutin.

Copies of this patent may be obtained for ve cents each. by addressing the Commissioner of Patents.

Washington, D. C.` 

